Christmas tree



FIG. 1 is a front perspective view of a Christmas tree showing my newdesign, with the bottles attached shown in broken lines and form no partof the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof, where the back view is identical to thefront view; and,

FIG. 5 is a left side view thereof, where the right side view isidentical to the left side view.

The ornamental design for a Christmas tree, as shown and described.